How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 5/11100.0*Relegated100.0*Average seed
Osasuna 2 Murcia 1 -15.6
+0.5
Almería 0 Recre 2 +13.6
-0.3
Real Zaragoza 2 Real Madrid 2 +1.2
+0.0
Valladolid 0 Getafe 0 +0.5
-0.0
Real Betis 0 Sevilla 2 -0.3
Athletic Bilbao 0 Racing 0 -0.3
Barcelona 2 Mallorca 3 -0.3
Atlético Madrid 1 Deportivo 0 -0.2
Week of 5/17100.0*Relegated100.0*Average seed
Mallorca 3 Real Zaragoza 2 No
+0.1
Racing 1 Osasuna 0 +4.2
-0.7
Recre 1 Valladolid 1 +2.9
-0.1
Valencia 3 Atlético Madrid 1 +0.1
Getafe 1 Real Betis 1 -0.2
Points
Chance Will Win Championship